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Controls on Terrigenous Detritus Deposition and Oceanography Changes in the Central Okhotsk Sea Over the Past 1550 ka

文献类型：期刊论文

作者Chou, Yu-Min11,12,13; Jiang, Xiaodong11,12,13; Lo, Li1,2,3; Wang, Liang-Chi4,5; Lee, Teh-Quei6; Wang, Chun-Chieh7; Pan, Yongxin8; Zou, Jianjun9,10; Humbert, Fabien13; Liu, Zhiqiang12,13
刊名FRONTIERS IN EARTH SCIENCE
出版日期2021-10-29
卷号9页码:17
关键词Okhotsk Sea paleomagnetism paleoenvironment mid-pleistocene transition mid-brunhes transition
DOI10.3389/feart.2021.683984
英文摘要The Okhotsk Sea, which connects the high latitude Asian continent and the North Pacific, plays an important role in modern and past climate changes due to seasonal sea ice coverage and as a precursor of the North Pacific Intermediate Water. The long-term glacial-interglacial changes of sea ice coverage and its impacts on terrigenous transport and surface primary productivity in the Okhotsk Sea remain, however, not well constrained. Base on the paleomagnetic, rock magnetic, micropaleontological (diatom), and geochemical studies of the marine sediment core MD01-2414 (53 degrees 11.77 ' N, 149 degrees 34.80 ' E, water depth: 1,123 m) taken in the central Okhotsk Sea, we reconstruct the terrigenous sediment transport and paleoceanographic variations during the past 1550 thousand years (kyr). Seventeen geomagnetic excursions are identified from the paleomagnetic directional record. Close to the bottom of the core, an excursion was observed, which is proposed to be the Gilsa event similar to 1550 thousand years ago (ka). During glacial intervals, our records reveal a wide extension of sea ice coverage and low marine productivity. We observed ice-rafted debris from mountain icebergs composed of coarse and high magnetic terrigenous detritus which were derived from the Kamchatka Peninsula to the central Okhotsk basin. Still during glacial intervals, the initiation (i.e., at similar to 900 ka) of the Mid-Pleistocene Transition marks the changes to even lower marine productivity, suggesting that sea-ice coverage became larger during the last 900 ka. During interglacial intervals, the central Okhotsk Sea was either devoid of sea-ice or the ice was at best seasonal; resulting in high marine productivity. The weaker formation of Okhotsk Sea Intermediate Water, lower ventilation, and microbial degradation of organic matter depleted the oxygen concentration in the bottom water and created a reduced environment condition in the sea basin. The freshwater supplied by snow or glacier melting from Siberia and Kamchatka delivered fine grain sediments to the Okhotsk Sea. During the stronger interglacial intervals after the Mid-Brunhes Transition (i.e., Marine Isotope Stages 1, 5e, 9, and 11), strong freshwater discharges from Amur River drainage area are in association with intensified East Asian Summer Monsoon. This process may have enhanced the input of fine-grained terrigenous sediments to the central Okhotsk Sea.

WOS关键词MAGNETIZATION LOCK-IN ; ICE-RAFTED DEBRIS ; INTERMEDIATE WATER VENTILATION ; MILLENNIAL-SCALE VARIATIONS ; NORTH PACIFIC ; ARCTIC AMPLIFICATION ; MARINE-SEDIMENTS ; LAKE ELGYGYTGYN ; LATE HOLOCENE ; LAST
WOS研究方向Geology
语种英语
WOS记录号WOS:000717818600001
出版者FRONTIERS MEDIA SA
源URL[http://ir.iggcas.ac.cn/handle/132A11/103832]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Chou, Yu-Min; Lo, Li; Wang, Liang-Chi
作者单位1.Natl Taiwan Univ, Dept Geosci, Taipei, Taiwan
2.Natl Taiwan Univ, Paleoceanog Lab, Taipei, Taiwan
3.Natl Taiwan Univ, Res Ctr Future Earth, Taipei, Taiwan
4.Natl Chung Cheng Univ, Dept Earth & Environm Sci, Chiayi, Taiwan
5.Natl Chung Cheng Univ, Environm & Disaster Monitoring Ctr, Chiayi, Taiwan
6.Acad Sinica, Inst Earth Sci, Taipei, Taiwan
7.Natl Synchrotron Radiat Res Ctr, Hsinchu, Taiwan
8.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
9.Minist Nat Resources, First Inst Oceanog, Key Lab Marine Geol & Metallogeny, Qingdao, Peoples R China
10.Pilot Natl Oceanog Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China
推荐引用方式
GB/T 7714		 Chou, Yu-Min,Jiang, Xiaodong,Lo, Li,et al. Controls on Terrigenous Detritus Deposition and Oceanography Changes in the Central Okhotsk Sea Over the Past 1550 ka[J]. FRONTIERS IN EARTH SCIENCE,2021,9:17.
APA Chou, Yu-Min.,Jiang, Xiaodong.,Lo, Li.,Wang, Liang-Chi.,Lee, Teh-Quei.,...&Liu, Zhiqiang.(2021).Controls on Terrigenous Detritus Deposition and Oceanography Changes in the Central Okhotsk Sea Over the Past 1550 ka.FRONTIERS IN EARTH SCIENCE,9,17.
MLA Chou, Yu-Min,et al."Controls on Terrigenous Detritus Deposition and Oceanography Changes in the Central Okhotsk Sea Over the Past 1550 ka".FRONTIERS IN EARTH SCIENCE 9(2021):17.

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来源：地质与地球物理研究所

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